#include <vector>
template<class... Types> auto init(size_t size, Types... args) {
if constexpr (sizeof...(args) == 1) {
return std::vector(size, args...);
} else {
return std::vector(size, init(args...));
}
}
template<class T, class...Types> auto
initialize_vector(T value, Types...args) {
return init(args..., value);
}